Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a15f238f9a10297…

MALICIOUS

PDF

77.7 KB Created: 2021-04-01 09:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f2aec55bd2ade4d8e3e81ae05bff7c42 SHA-1: efa6fec7e3068ff78f96927faf8edefff697c542 SHA-256: 3a15f238f9a102977a0ef1926e9ce3c4e325b4a4b00d0be2b2bc82ad2ca38830
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, with a notable heuristic indicating it's part of a link farm on disposable hosting. The primary URLs identified point to domains associated with distributing further content, suggesting a role in a larger phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/wix?keyword=love+that+dog+lesson+plans+pdf PDF link annotation
    • http://hamlikjorettoop.ru/67446571798m6dh8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450733/normal_5ff4d0c6c7153.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/aghIhcu/kukopaviveg.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/daily_use_english_sentences_in_office.pdfIn PDF document text
    • http://rimarilomikozu.medianewsonline.com/28758956975.pdfIn PDF document text
    • http://walkover.me/fosajs80eu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_6061aab762da6.pdfIn PDF document text
    • https://womerakuketuzal.weebly.com/uploads/1/3/1/8/131856195/xizofom_laguf.pdfIn PDF document text
    • https://vakonawokedoze.weebly.com/uploads/1/3/4/5/134522954/debapujegawi.pdfIn PDF document text
    • http://meroxisawifagu.mygamesonline.org/larexizulak.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/hedieA5/38219377202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5fe6c0676d9d7.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/4171dc5a84.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/Eghjhhc/12970238952.pdfIn PDF document text
    • http://reform-st.ru/what_does_gre_percentile_mean8rxb0.pdfIn PDF document text
    • https://rinezafuwokof.weebly.com/uploads/1/3/1/4/131437641/vofelevomeruvi.pdfIn PDF document text
    • http://eurostore.info/9_times_table_worksheet_with_answers5hu9g.pdfIn PDF document text
    • https://vojonabof.weebly.com/uploads/1/3/1/3/131383251/8848430.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/what_is_digital_tv_converter_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f94e05-dbfc-40e0-a47f-b66348ab227a/zelda_ocarina_of_time_walkthrough_n64.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac7f2ca-d662-4a51-82f3-6926ab6caa91/32712865250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5a6342-d386-4914-a1c8-2ad388063c36/32514823859.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/zewakafamazomigosope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60701342-8917-4ca1-b2d0-8e76842b907a/marketing_management_class_12_mcq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31fb65a4-f5b3-4f20-bf60-7ae8ad13c25d/yamaha_psr_e253_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 5208 bytes
SHA-256: 918655078730161fb9105f0532b2982f3cc4947cb10a14d64a6b23e865249b81
font_01_sfnt_off00010541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 10520 bytes
SHA-256: fc755a7855739cc450326436af5cb764bfe516249a42619cf8d176f8de503cee

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